--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/org/dive4elements/river/client/server/DischargeTablesServiceImpl.java	Thu Apr 25 12:31:32 2013 +0200
@@ -0,0 +1,143 @@
+package de.intevation.flys.client.server;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.text.DateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.log4j.Logger;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.httpclient.http.HttpClient;
+import de.intevation.artifacts.httpclient.http.HttpClientImpl;
+import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler;
+
+
+public class DischargeTablesServiceImpl extends HttpServlet {
+
+    private static final Logger logger = Logger
+        .getLogger(DischargeInfoServiceImpl.class);
+
+    private static final DateFormat DATE_FORMAT = DateFormat.getDateInstance(
+        DateFormat.MEDIUM, Locale.GERMANY);
+
+    public void doGet(HttpServletRequest req, HttpServletResponse resp) {
+        logger.info("ChartOutputServiceImpl.doGet");
+
+        String url = getServletContext().getInitParameter("server-url");
+        String locale = req.getParameter("locale");
+
+        prepareHeader(req, resp);
+
+        Document requestDoc = createRequestDoc(req);
+
+        HttpClient client = new HttpClientImpl(url, locale);
+
+        try {
+            OutputStream out = resp.getOutputStream();
+            InputStream stream = (InputStream) client.callService(url,
+                "dischargetablesoverview", requestDoc,
+                new StreamResponseHandler());
+
+            byte[] b = new byte[4096];
+            try {
+                int i;
+                while ((i = stream.read(b)) >= 0) {
+                    out.write(b, 0, i);
+                }
+            }
+            finally {
+                stream.close();
+            }
+        }
+        catch (IOException ioe) {
+            logger.error("Error while fetching discharge tables chart!", ioe);
+        }
+    }
+
+    protected void prepareHeader(HttpServletRequest req,
+        HttpServletResponse resp) {
+        resp.setHeader("Content-Type", "image/png");
+    }
+
+    protected Document createRequestDoc(HttpServletRequest req) {
+        Document request = XMLUtils.newDocument();
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(request,
+            null, null);
+
+        Element service = creator.create("service");
+        Element gauge = creator.create("gauge");
+        Element extent = creator.create("extent");
+        Element format = creator.create("format");
+        Element timerange = creator.create("timerange");
+
+        creator.addAttr(gauge, "name", extractRequestGauge(req));
+        creator.addAttr(extent, "width", extractRequestWidth(req));
+        creator.addAttr(extent, "height", extractRequestHeight(req));
+        creator.addAttr(format, "type", extractRequestFormat(req));
+        creator.addAttr(timerange, "lower", extractRequestLowerTime(req));
+        creator.addAttr(timerange, "upper", extractRequestUpperTime(req));
+
+        request.appendChild(service);
+        service.appendChild(gauge);
+        service.appendChild(extent);
+        service.appendChild(format);
+        service.appendChild(timerange);
+
+        return request;
+    }
+
+    protected String extractRequestGauge(HttpServletRequest req) {
+        return req.getParameter("gauge");
+    }
+
+    protected String extractRequestWidth(HttpServletRequest req) {
+        return req.getParameter("width");
+    }
+
+    protected String extractRequestHeight(HttpServletRequest req) {
+        return req.getParameter("height");
+    }
+
+    protected String extractRequestFormat(HttpServletRequest req) {
+        return req.getParameter("format");
+    }
+
+    protected String extractRequestLowerTime(HttpServletRequest req) {
+        String lowerStr = req.getParameter("lower");
+        try {
+            long lowerMillis = Long.parseLong(lowerStr);
+            Date lower = new Date(lowerMillis);
+
+            return DATE_FORMAT.format(lower);
+        }
+        catch (NumberFormatException nfe) {
+            logger.warn("Cannot parse time millies.", nfe);
+        }
+
+        return null;
+    }
+
+    protected String extractRequestUpperTime(HttpServletRequest req) {
+        String upperStr = req.getParameter("upper");
+        try {
+            long upperMillis = Long.parseLong(upperStr);
+            Date upper = new Date(upperMillis);
+
+            return DATE_FORMAT.format(upper);
+        }
+        catch (NumberFormatException nfe) {
+            logger.warn("Cannot parse time millies.", nfe);
+        }
+
+        return null;
+    }
+}